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CHAPTER 4
Traffic Control Issues
A confirmed foreign plant or animal disease will most likely require an immediate quarantine
radius of several miles. In a rural county, a 3- to 6-mi (5- to 10-km) quarantine radius could
involve 10 to 35 vehicle entry and exit points along the quarantine boundary that must be bar-
ricaded or manned to control traffic. The following types of vehicles should be controlled, and
each type will require different procedures at traffic control points:
· All vehicles, both agricultural and nonagricultural, entering, exiting, or passing through quar-
antined area;
· Vehicles transporting (legally or illegally) live-stock, poultry or produce; and
· Emergency response vehicles.
While police officers and sheriff's deputies have the most experience with law enforcement
road blocks and traffic stops, they are often not aware of the proper quarantine procedures for
an agricultural emergency. They may also not have adequate resources and personnel for effec-
tive traffic control on the scale necessary for a quarantine that covers over 100 mi2 (259 km2) and
that may last 2 months or longer.
4.1 Levels of Traffic Control
This guide describes three levels of traffic control that can be used in an agricultural emer-
gency. These three levels of traffic control are:
Level 1: Traffic check points with cleaning and disinfection stations--Traffic checkpoints
prevent the spread of disease by ensuring traffic is controlled and only authorized
vehicles are allowed to move in or out of the quarantine area. Level 1 checkpoints
are used with the added provision of a station to clean and disinfect vehicles and
equipment and to disinfect individuals exiting a quarantine zone. In an agricultural
emergency, the quarantine applies directly to plants or animals, but individuals and
vehicles may spread the disease if disinfection efforts are not utilized.
Level 2: Traffic checkpoints--Vehicles are screened and those related to agriculture are
returned to their places of origin or holding sites, or they are allowed to proceed
under permit.
Level 3: Road closures--Roads are barricaded and all traffic movement is stopped.
The Level 1 and 2 traffic checkpoints require substantially more equipment and personnel
than the Level 3 road closures, which will generally be the most common type of traffic control
used. Generally, at least one law enforcement officer will be needed at each traffic checkpoint.
Locations for traffic checkpoints will be determined based on a priority scale that considers traffic
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